Delete row sig_c9603fa99929 from signals

id sig_c9603fa99929
event_id evt_491e23c8fef9
watcher_id NULL
signal_type news_headline_delta
value {"aggregator_url":"https://news.google ...
threshold NULL
direction NULL
severity NULL
window NULL
source news_rss
reason_trace {"_evidence_event_ids":["evt_5d586c822 ...
dedupe_key signal_enriched:news_delta:c19a3f7b64d06713
throttle_s 0
created_at 2026-04-20T17:59:51.882554+00:00
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